JPS56141959A - Casting pressure control device for low-pressure casting machine - Google Patents
Casting pressure control device for low-pressure casting machineInfo
- Publication number
- JPS56141959A JPS56141959A JP4520680A JP4520680A JPS56141959A JP S56141959 A JPS56141959 A JP S56141959A JP 4520680 A JP4520680 A JP 4520680A JP 4520680 A JP4520680 A JP 4520680A JP S56141959 A JPS56141959 A JP S56141959A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- molten metal
- furnace
- signal
- stalk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To provide always homogenous cast products by setting the final target pressure at the pressure at the arrival of the molten metal at the predetermined point where the sectional area from a stalk until filling into a metal mold changes sharply plus the pressure component required for completion of filling into the metallic mold from this predetermined point and head pressure component.
CONSTITUTION: The pouring pressure control device of this low-pressure casting machine operates like this: The space in the upper part of the molten metal in a heat insulating furnace 1 which is tightly sealed and in which the molten metal 2 is stored is pressurized by air, and molten metal 2 is conducted from the stalk erected in the molten metal in the furnace 1 into a metal mold 4, after which the pressurizing is retained and the molten metal 2 is allowed to solidify. During this time, the arrival of the molten metal 2 at the predetermined point where the sectional area changes sharply while it is being filled from the stalk 3 into the metallic mold 4 is detected by the pneumatic pressure measuring means 8 in the furnace 1 and by discriminating the inflection point of the pressure signal from this means 8. Thence, according to the signal from this detection signal, the final target pressure is set in a signal processing circuit 13 and according to the control signal from this circuit 13, the pneumatic pressure to be supplied to the furnace 1 is controlled 6 until the target pressure is reached, whereby the pressure is set and controlled to the optimum final target pressure according to the molten metal amount in the furnace 1.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4520680A JPS56141959A (en) | 1980-04-08 | 1980-04-08 | Casting pressure control device for low-pressure casting machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4520680A JPS56141959A (en) | 1980-04-08 | 1980-04-08 | Casting pressure control device for low-pressure casting machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56141959A true JPS56141959A (en) | 1981-11-05 |
JPH0214144B2 JPH0214144B2 (en) | 1990-04-06 |
Family
ID=12712787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4520680A Granted JPS56141959A (en) | 1980-04-08 | 1980-04-08 | Casting pressure control device for low-pressure casting machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56141959A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63290674A (en) * | 1987-05-21 | 1988-11-28 | Aichi Mach Ind Co Ltd | Pressure raising device for low pressure casting machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5030738A (en) * | 1973-05-12 | 1975-03-27 |
-
1980
- 1980-04-08 JP JP4520680A patent/JPS56141959A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5030738A (en) * | 1973-05-12 | 1975-03-27 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63290674A (en) * | 1987-05-21 | 1988-11-28 | Aichi Mach Ind Co Ltd | Pressure raising device for low pressure casting machine |
JPH0426936B2 (en) * | 1987-05-21 | 1992-05-08 | Aichi Machine Ind |
Also Published As
Publication number | Publication date |
---|---|
JPH0214144B2 (en) | 1990-04-06 |
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